Chicago's trusted wireless & tech experts
Sigma Tech Group has been serving the Chicago community with honest advice, fair prices, and expert service since day one.
10+
Years serving Chicago
5,000+
Devices repaired
12,000+
Happy customers
4.9★
Average rating
Our story
Sigma Tech Group was founded right here in Chicago with a simple mission: give everyday people access to the same quality wireless service and device repair that big carriers charge a premium for. We started as a small shop on Fullerton Ave and have grown into a trusted neighborhood resource for wireless plans, device repair, and satellite TV — all under one roof.
What we stand for
These aren't just words on a wall — they're how we show up every day for our customers.
Honest advice
We tell you what you actually need — not what earns us the biggest commission. Our team takes time to understand your situation before making a recommendation.
Community first
We're a Chicago business serving Chicago people. We invest in our neighborhood and treat every customer like a neighbor, because they are.
Real expertise
Our certified technicians and wireless specialists have years of hands-on experience. When you bring us a problem, we know how to solve it.
Unbeatable value
From Total Wireless plans starting at $25 to same-day device repairs, we make sure you get the most for your money.
Come see us in person
Stop by our Fullerton Ave store — no appointment needed. We're here to help.
3356 W. Fullerton Ave, Chicago, IL 60647